import java.util.Scanner;
public class Example2_3 {
	public static void main (String args[]) {
	System.out.println("请输入若干个数，每输入一个数回车确认");
	System.out.println("最后输入数字0结束输入操作");
	Scanner reader = new Scanner(System.in);
	double sum = 0;
	double x = reader.nextDouble();
	while(x!=0){
		sum = sum + x;
		x=reader.nextDouble();
	}
	System.out.println("sum="+sum);
	}
}
